Multiple control system.



H. w. LEONA-RD. MULTIPLE OONTROL SYSTEM. LPPLIQA'I'ION FILED MAR. 22, 1902. RENEWED JULY 6, 1906.

1,003,927. Patented Sept. 19,1911.

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I n K: P .m-ztclz UNITED STATES PATENT OFFICE.

HARRY WARD LEONARD, OF BRONXVIiLE, MULTIPLE CONTROL SYSTEM.

1,003,927. p ifi i n f Letters Patent Patented Sept. 19, 1911.

Original application filed January 24, 1901, Serial No. 44,565. Divided and this application filed March 22, 1902, Serial No. 100,142. Renewed July 6, 1906. Serial No. 325,000. To all whom it may concern. other translating devices are connected to a Be it known that I, HARRY WARD LEON- system of three conductors which are con- ARD, a citizen of the United States, residing nected through the regulating machines with at Bronxville, in the county of \Vestchester the main source of supply. and State of New York, have invented a cer- In Figure 1 is illustrated the connections 69 tain new and useful Improvement in Mnlwhich may be employed when the current ti ple Control Systems, 0 which the followthrough the generator field orother device inglis a description. 4 1s. to be controlled from several different y invention relates to electric transmispoints but not reversed"; and Fig. 2 illussion of power,'an'd my principal ob'ect is trates two connected cars, each equipped 5 the'.ope ratiou.'of electric translating evices with two propellin motors, a dynamo elecin suclna way' that one or more of such de-- trio generator, an an exciter of variable vices can be.' controlled from several diiferand reversible electro-motive force, the cnt oints. original source of current being-indicated as E" -T e present application is 'a division of a 3-phase circuit. 70

my application filed Janua 24th, 1901, .In Fig.1, I illustrate an arrangement of I, Patent No. 696,247, issued ll 25, 1902. circuits whereby a' translating device, illus- The claims of the present application are trated dia mmatically asa magnet 0!, may directed to combinatlonsnot claimed in said be control ed froman one of a number of patent. ,Certain of thecomb'inations'claimed points A, B or C, 'w ich may correspond 7 erein relate to aivariable voltage source of with the cars of. Fig. 2. A generator G control energy with means responsive to va driven from any source of power, as for exejations-of volta e of the control nergy to ample b a motor receiving current from oontnol a mnltip e unit systm. a suitab e1. trolley system, supplies current 25 c.-One o the ,most important applications'of to wires a and c, which are-connected toso my. in ffinivention. is. tlie simultaneous gcther from car to car, Arranged on each coirtrolzo ca. piurality s1- electric motors 10- of the ca-rsris a rheostat e e 0 respectively, cated.upon';d11farent.cars composinga train, connected betvlieenthe wire a and a wire 6 so that frbmaany one of several different extending parallel therewith and between cars the motors can be operated atan' dcwhich and the wire a the t'ranslat' device sired speed and in either direction while at d isfonnected in parallel. It will e seen the same time they will operate in harmony, that Byo' erati g' either of the rheostats e, dividjnglthe load @proinmately in propor e or. e t ie'others being open, the current tion-to their dapacit My invention is also Supplied to the translating device huh he 35 capableuof use in e operation of electric increased or diminished at will to-prgperly all M i or other purposes as for cxcontrol the latter and any devices a ected -c.'onnection with pumps-,zswinging 'by it. i a ers, In F' 2, I illustratelneansfor cont'rol-'= iurality of motors or nth'er eletric le.: ges, elevators, cranes, vgun s, propel rudders, metal "rolls, movm'g esideewalks, l ng a p ev oea',a=' l1s.vvell as. valfis and governors of and as to the direction of rotation of. engmes,.turl;1nes etc -o y uivent1on'1s,howarmatures orotherim'ovable elements, from ei-iezg'notlimit *to rthegcontrdliof electric any, point on a circuit of three Wires:- The motors but be utilized in'controlling :eontrolling motor a is of,any=suitable type,

l6ri11tingpre$$fiible power transmitting translating devices, both as to their a? V 5' thq-rolta ge'oi; ,e-eurrent supplied to'other electrical ormechaniu l but for the purpose lh't.

electric translating devices such. as electric fofi illustration 'Ihave' re resented it asra" lights, e1ectr1c'. lreaters,2 eost'ats,-=-- circuit ti-phase" motor suppli by. a circuit QOfitlOlllSi: electric rjurnaoes, storage but 4."5 '6'. The motor ,1 drives the arms teries,'-electrolyti c.oells, and-m fact incchatureof asmall shunt (1 name H, which supnism in genefal pperated or controllcd from plies current tothe old of a. controlling several pointr'thro ghftheagencyofelectnc mntinuou's culrent enerator F through a energy. 7 rcversi rheostat whereby the electro- The present up "L'J I, plication illustrates the motive once "dlrection of current on principle of mynnmtion'apphed more parplied by the esgcitar. H to the field of t e tieplarlyipizls'ystanwhcremthe motors or generator F inafibfvaried or reversed, as if!) through a reversing rheostat R, as with the car A. G G represent two continuous current generators driven from any suitable source of power, electrical or mechanical, and which may be separated to any desired "extent, one for example ,;being mounted on.

one of the cars A, constituting a train, and the other on anotherof such cars, B, assuming the invention to be utilized-1dr the controlling of the propelling motors of a train com osed ofi a series of inotopcars. Thus, in ig. 2, I illustrate the generator G on the car A as being operated byafi-phase motor A, and the generator G on the car B as being operated by a 3-phase i'notor A. The electromagnetic field windings W, N of the continuous current generators G G are connected "in' parallel with the controlling circuit 2-3, whereby, in responding to varmM of voltage on the controlling circuit 2-3, the strength of such fields can be simultaneously varied and theirfpolarity simultaneously reversed at willto permit such enerators to supply currentsofcorrespon mg electromotive force and direction at all times. .The armature of the generator G is connected by a series parallel switch- K with the armatures of the motors M M,

and the armature of. the enerat'or G is connected by a series paralle switch K with the armatures of the propelling motors M M. The series parallel controlling switches. K ancL-K are of any common .form, by means of which the a-rinatures of the motors M M or M M'- may be connected in series or in parallel with-each other. The'fields of themotors M and M are connected in parallel, with a circuit 1-2 supplied with current'of constant 'electromotive force from the exciter H, as shown. In the field of each-of the pro )elling motors M M or M" M is prefers ly placed a small cont-rolling rheostat r, by means of which each of the motors may be adjusted so as to always assume its proportionate share of the load,. and by means of which the adjustment so effected can be varied when for an cause that is necessary, as for example w on the whcelsdrivcn b that Harticular motor become worn an of re uced diameter.; A controlling rheostat 1' may also be mounted in the common circuit leading to the fields,

of the two motors M M or M M for each locomotive, and by means of which both motors may simultaneously be varied when desired, in order that one locomotive as aunit may assume its desired or proportionate share of the load imposed on the train. A. small rheostat r in the field circuit of the exciter H is also employed for the urpose of controlling the electro-motive orce thereof.

In operation, assuming the motors a a and generators G G to be rotating at the proper approximately constant speed, and the handle of each of the rheostats R B. to be in its central or neutral position, current of constant electromotive force will besup plied, for example, by the excitcr H to the circuit 12 to energize the fields of the propelling motors M M, the brushes of the exciter H being raised. No current will, however, energize the fields of the controlling generators F F, and in consequence no current will be generated in the controlling circuit 23, so that the field magnets W, W, of the generators G and G will not be excited, said generators will generate no current, and the motors M M will therefore be at rest. By gradually moving the handle of the rheostat R for example, current in one direction or the other will be permitted to energize the field of the controllin generator F with the desired polarity an with gradually-flowering strength, whereby a current of gradually increasing electromotive force will be generated in the controlling circuit 2-3. The strength of the electromagnetic field windings of the enerators G and Gr will be 00I'I'BS3011dingly increased, and a current of re ually increasing electromotive force wil be generated by the generators G and G to sup- 'ply the motors M and M, which will start to operate at a ra'duall increasing speed. *In this way obvlousl t e s ed of the motors M and M 'can e simu taneously controlled and the direction of their armatures reversed by either the rheostat R or R, or by means of any other rheostat having the capacity of varying the electromotive force and the direction of current supplied to the controlling circuit 23, it being understood that the rheostats which are not operating are maintained in their neutral position and that the adjacent exciting nerators F,H, etc; are out of circuit. 0 viously,;by connecting to the circuits 1 -2 and 2-3 .a controlling ap aratus comprising. a motor a, an exciter l a eontrollin generator F, and 'a rheostat-R; as explaine the speed of the propellin motors can be 'six'nultaneously controlle and the direction of rotation of their armatures reversed from any other point on the circuit composed of the three wires 1, 2, 3. i

4 Instead of varying the electromotive force of the controlling generator F by producing variations in the field strength thereof, it will of course be understood that the result can be secured in other ways familiar to those skilled in the art, as for example by varyin the speed of rotation of thearmature of the controlling generator or by re vex-sing the sense of rotation thereof when a reversal of the polarity of the generators G and G is desir m In some instances the machines A A and G G" need not necessarily be separate machines, since any lmown form of electric entransformers may be employed, which receive electric ener yin any suitable form and deliver 'suitabe electric energy of controllable electromot-ive force, instead of the separate machines. In some instancesyinstead of emplovin d namo elecample the trio generators for eicltirig t e elds of the propelling motors or for supplying other circuits used in the apparatus, other forms of current supply can be utilized, as for example primary or secondary batteries, thermo-electric nerators, or magneto machines. It will furthermore be understood that other forms of cnerators and motors can be utilized from t one shown,- as for exgenerators may be compound wound and the motors may be series wound.

Furthermore, it will. be obvious that all known forms of series parallel control may be used in connection with the motor armatures. It will also be understood that instead of reversing the {rotation of the motor armatures by reversin the current in the supplyinggenerators t erefor, the current supplied by the generators may be maintamed in a constant direction and a'reversing switch. be interposed between the sameand the motor. armature for reversing the current in the latter, or the field of the mo; tor may be reversed. It will a'so appear from my descri tion that instead of operatin'g the severa controlling motors or the motors for driving the generators by electric energy, mechanical motors for the urpose may be utilized, and that instea of using a 3-phase currentas explained, a single-phase or any other form'of alternating current or electric current ada ted to produce another by induction can employed.

What I claim is: a

1. A system of three conductors extending through a train of cars and connected be tween the cars, a source of constant electromotive force connected betweentwo of the said conductors, a tra'nslat' device connected between one ofthe sai twoconductors and the third conductor, and means upon several cars by which the third conductor and the other of said two conductors can be connected together through a device which will enablet e o 'rator to vary at will the electro-motive ms at the terminals of the translating device.

said conductors at several difl'erent" 2. A system tof three conductors, a source of constant electro-motive force connected between two of'the said conductors, the field windin of a dynamo electric machine connected etween one of the said two conductors and the third conductor, and means at two or more diflerent points for connecting said 'thirdconductor with the other of the said two conductors.

3. A system of three conductors an electrical translating device connected across one pair of said conductors, and means connected acrossanother pair of said conductors at several difi'erent oints, whereby at any one of said points t e electro-mot-ive force may be varied at the'gvill of the operator.

4. A system of three conductors an electromagnet connected across one pair of said conductors, and means connected across another pair of said conductors at several different points, whereby at any one of said points the magnetism of said magnet may e varied at the will of the operator.

5. A system of three conductors two independent electrical translating devices connected across one pair of said conductors, and means connected across another pair of said conductors at several difl'erent whereby at any one of said points the e ectromotive force at the terminals of said trans lating devices may be similarly varied at the will of the o rator. I I m 6. A system Q three conductbrs two independent elect-ro -ma ets connected across one pair of said con uctors,- and means connected across another at several difi'erent points, whereby at any one of said points the magnetism of said magnets may be similarly varied at the will of'the operator.

7. A system of three conductors an electrical translating device connected across one pair of said conductors, and means connected across another pair of said conductors at several difierent oints, whereby at any one of said points t e electro-motlvc force at the terminals of said translating device maybe varied or reversed at the will-of the operator.

8. A system of three conductors an electro ma et connected across one pair of said con uctors, and means connected across anoints,

other pair of said conductors ,at several I different points, whereby at any one of said oints the magnetismof said-m et may e varied and reversed at the w of the operator.

9. A system of three conductors two inde v pendentelectrical translatin devices connected across one pa r of said conductors and means connected across another pair 0% whereby at any one of said points the e ectromotiveforoe at theterminals of said. transoints,

lating device may be similarly varied and reversed at the will of the operator.

10. A system of three conductors two independent electro-magnets connected across one pair of said conductors, and means connected across another pair of said conductors at several different points, whereby at any one of said points the magnetism of said magnets may be similarly varied and reversedat the will of the operator.

11. In an electric railway system, two or more cars cou led together, a series of conductorsexten ing through the cars, one or more driving motors for said cars, a dynamo electric machine supplying energy to said motor or motors, the field winding of said machine being connected across one pair of said series of conductors, and means connected across another pair of said conductors whereby the strength of said field winding may be varied to vary the energy supplied to said motor or motors. I

- 12. In an electric railway system, two or more cars cou led together, a series of conductors exten ing through the cars, one or more driving motors for said cars, a dynamo electric machine supplying energy to said motor or motors, the field winding of said machine being connected across one pair of said series of conductors, and separate means on each car connected across another pair of said conductors whereby from any one point the strength of said field winding may be varied to vary the energy supplied to said motor or motors.

13. In an electric railway system, two or more'cars coupled together, a series of conductors extending through the cars, one or more driving motors for said cars, a dynamo electric machine supplying energy to said motor or motors, the field winding of said machine being connected across one pair of said series of conductors, and means. connected across another pair of said conductors whereby the strength of said field winding may bevaried or reversed in sense to vary or reverse the energy supplied to said motor or motors.

14: Inan electric railway system, two or a more cars coupled together, a series of conductors extending through the cars, one or more driving motors for said cars, a dynamo electric machine supplying energy to said motor or motors, the field winding of said machinebeing connected across one pair of said series of conductors, and separate means on each car connected across another pair of said conductors whereby from any one point the strength of said field winding may be varied or reversed in sense to vary or reverse the energy so plied to said motor or motors. 15. In an e ectri'c railway system, two or more cars coupled together, a series of conductors exten more driving motors for said cars, a dynamo,

- tric machine su electric machine on each of said cars suppl ing energy to said motors, the field windings of said machines being connected across one pair of said series of conductors, and means connected across another pair of said conductors whereby the strength of said field windings may be similarly varied to vary the energy supplied to said motors.

16. In an electric railway system, two or more cars coupled together, a series of conductors exten ing through the cars, one or more driving motors for said cars, a dynamo electric machine on each of said cars su plying energy to said motors, the field windings of said machines being connected across one pair of said series of conductors, and means connected across another pair of said conductors, whereby the strength of said field windings may be similarly varied or reversed in sense to vary or reverse the energy supplied to said motors. 17. In an electric railway system, two or more cars cou led together, a series of conductors exten ing through the cars, one or more driving motors for said cars, a dynamo electric machine on each of said cars sugplying energy to said motors the field win ings ofsaid machines bein connected across one pair of said series 0 conductors, and separate means on each car connected across another pair, of said conductors, whereby from any one point the strength of said field windings may be similarl varied to vary the energy supplied to sai motors.

1.8. In an electric railway (fist/e111, two or more cars cou led together, a series of conductors exten ing through the ears, one or more driving motors for said cars, a dynamo electric machine on each of said cars supplying energdy to said motors, the field windings of sai machines being connected across one pair of said series of conductors, and separate means on each car connected across another pair of said conductors whereb from any one point the strength oi said fie d windings may be similarly'varied or reversed in sense. to vary or reverse the energy supplied to said motors.

ductors, one or more motors, a dynamo elecplIying energy thereto, a e ectric energy connected the field winding of divided source 0 to said three conductors,

said dynamo electric machine being connected across one' pair of said conductors, and meansior varyin the electric-motive force across! said pair 0 conductors.-

.20. In an electric power system, three conductors, one or more motors, a dynamo electric machine supplying energy thereto, a divided source of electric ener connected to said three conductors, the old winding of said dynamo electrlc machine being connected across one pair of said conductors, and means for .varymg or reversing the elcctromotive force across said pair-of conductors.

21. In an electrical power system, three conductors, one or more motors, a d namo electric machine supplying energy t ereto,

a divided source of electric energy connected to said three conductors, the fie d winding of said dynamo electric machine being connected across-one pair of said conductors and the field windlng or windings of said motor or motors bein connected across another pair of said conductors, and means for varying the electro-motive force across the first named pair of conductors.

22. In an electric power system, three conductors, one or more motors, a dynamo electric machine suppl ing energy thereto, a divided source ofeliactric energy connected to said three conductors, the field winding of said dynamo electric machine being connected across one pair of said conductors and the field winding or windings of said motor or motors bein connected across another pair of said con actors, and means for varying-pr reversing the electro-motive force across the first named pair of conductors.

23. In an electrical power system, three conductors, "one or more motors, a d namo electric machine suppl ing energy t ereto, two divided sources of electric ener connected to said three conductors, the field windingof said dynamo electric machine being connected across one pair of said onductors, and means for varying said 'divided sources of energy independently of .each other to vary the electro-motive force across said pair of conductors.

24. In an electrical power system, three conductors, one or more motors, a dynamo 0 electric machine supplying energy thereto,

two divided sourcesof electric energy connected to said three conductors, the field winding of said dynamo electric machine being connected across one pair of said conductors, and means for varyingor reversing said divided sources of energy independently of each other to vary or reverse the electro-motive force across Said pair of conductors.

'25. In an electrical power system, three conductors, one or more motors, a d amo electric machine supplying energy tiereto, two divided sources of electric energy connected to said three conductors, the field winding of said dynamo electric machine ing connected across one pair of said conductors and'the field winding or windings of said motor or motors bein connected across another pair of saidcon uctors, and

0 means for varying said divided sources of energy independently of each other to vary the electro-motive force across the first named pair of conductors.

26. In an electric railway system, tvgo or more cars coupled together, threeconductors extending through the cars, one or more driving motors for said cars, a dynamo electric machine supplying energy thereto, a divided source of electric ener y connected to said three conductors, the lield winding of said dynamo electric machine being connected across one pair of said conductors, and means for varying the electro-motive force across said pair ofconductors.

27. In an electric railway system, two or more cars coupled together, three conductors extending through the cars, one or more driving motors for said cars, a dynamo electric machine supplying energy thereto, a divided source of electric energy connected to said three conductors, the fie d winding of said dynamo electric'machine being connected across one tro-motive force across said pair of conductors.

28. In an electric railway system, two or more cars coupled together, three conducftors extending through the cars, one or more driving motors .for said cars, a dynamo electric machine supplying energy there i to, a divided source 0 electric energy connected to said three conductors, the field winding of said dynamo electric machine being-connected across one pair of said conductors and the field wlnding o r,-windings of said motor or motors beln connected across another pair of said con uctors, and means for varying the electro-motive force across the first named pair of conductors.

29. In an electric railway system, two or more cars coupled ether, three conductors extending through c cars, one or more driving motors for said cars, a d namo electric machine supplying energy t ereto, a divided source of electric ener connected to said three conductors, the fie of said dynamo electric machine being connected across one air of said conductors, and the field winding or windings of said motor or motors bei connected across another pair of said con uctors, and means for varying or reversing the elect-ro-motive force across the first named pair of conductors.

30. In, an electric railway system, two or more cars coupled together, three conductors extending through the cars, one or more driving motors for said cars, a dynamo electric machine supplying energy thereto, a divided source of electric ener y on each car connected to said three con uctors, the field winding of said dynamo electric machine being connected across one pair of said conductors, and means on .each car for varying the electro-motive force across said pair of conductors.

31. In an electric railway system, two or more cars coupled together, three conductors extending through the cars, one or more driving motorsfor said cars, a dynamo elecair of said conductors,-- and means for varying or reversing the eleccl windingconnected to said three conductors, the fieldwinding of said dynamo electric machine being connected across one pair of said conductors, and means on each car for varying or reversing the clectro-motive force across said pair of conductors.

32. In an electric railway system, two or more ca rs coupled together, three conductors extending through the cars, one or more driving motors on each car, a dynamo electric machine on each car supplying ener to the driving motor or motors, a divided source of electric energy connected to said three conductors, the field windings of said dynamo electric machines being connected across one pair of said conductors, and means for varying the electro-motive force across said pair of conductors.

33. In an electric railway system, two or more cars coupled together, three conductors extending through the cars, one or more driving motors on each car, a dynamo electric machine on each car supplying energy to the driving motor or motors, a divided source of electric energy connected to said three conductors, the field windings of said dynamo electric machines being connected across one pair of said conductors, and

means for varying or reversing the electromotive force across said pair of conductors.

34. In an electric railway system, two or more cars coupled together, three conductors extending through the cars, one or more driving motors on each car, a dynamo electric machine on each car supplying energy to the driving motor or motors, a divided source of electric energy on each car connected to said three conductors, the field V windings of said dynamo electric machines.

being connected across one pair of said conductors, and means on each car for varying the electro-motive force across saidpair of conductors.

35. In an electric railway system, two or more cars coupled together, three conductors extending through the cars, one or more driving motors on each car, a dynamo electric machine on each car supplying energy to the driving motor or motors, a divided source of electric energy on each car connected to said three conductors, the field windings of said dynamo electric machines being connected across one pair of said oonductors, and means on each car for varying or reversing the electro-motive force across said pair of conductors.

36. In an electric railway system, a main source of alternating current, conductors extending therefrom along the railway, a car provided with means for making traveling contact with said conductors, an alternating current motor on said car, a dynamo electric 65 machine driven by said motor, one or more in series with the armature 'of one of driving motors for said car supplied with energy from said dynamo electric machine, a divided source of electric energy on the car, three conductors extending therefrom, the field winding of said dynamo electric machine being connected across one pair of said three conductors, and means for varying the electro-motive force across said pair of conductors.

37. In an electric railway system, a main source of alternating current, conductors extending therefrom along the railway, a car provided with means for making traveling cont-act therewith, an alternating currentmotor on said car, a. dynamo electric machine driven by said motor, one or more driving motors for said car supplied with energy from said d namo electric machine, a divided source 0 electric energy on the car, three conductors extending tierefrom, 5 the' field winding of said dynamo electric machine being connected across one pair of said three conductors, and the field winding or windings of said driving motor or motors being connected across another air of said three conductors, and means or var ing the electro-motive force across the rstnamed pair of conductors.

38. In an electric railway system, a main source of alternating current, conductors extending therefrom along the railway, a car providedwith means for making traveling contact therewith, an albernat n current motor on said car, a dynamo e ectric machine driven by said motor, one or more driving motors for said car supplied with energy from said d namo electric machine,

a divided source 0 electric energy on the car comprising two dynamo electric machines having their armatures connected in series and driven by an alternating current motor, three conductors extending therefrom, the field winding of said first-name dynamo electric machlne being connected across one pair of said three conductors, and means for varyin the electro-motive force across said pair 0? conductors. i

39. Two electric motors, a main source of electric energy, two dynamo electric machine's, the armature ofeach being connected 11 said motors. a circuit to which the field windings of said dynanios are connected, and a controlling rheostat connected betweenf the main source and said circuit and whcrby the fields of said dynamos are varied to vary the energy developed by said dynamos.

40. Two electric motors, a main source of electric energy, two dynamo electric machines, the armature of each being connected in series with the armature of one of said motors, a circuit to which the field windings of said dynamos are connected, and a reversing rheostat connected between the main source and said circuit and wherebv 3 .motors,.ai circuit of said dynamos are connected, and two conthe fields of said dynamics are varied or reversed to rary or reverse the energy developed by said dynamics:

41., 'lwtfelcctric niotors, a main source of electric energy, two dynamo electric machines, the armature of each being connected in series with .'the armature'of one of said to which the field windings trolling rheostats connected between the main source and said circuit at different points and by either of which the fields of said dynamos are varied to'vary the energy developed by said dynamosl 42. Two electric motors, a main source of electric energy, two dynamo electric machines, the armature of each being connected in series with the armature of one of said motors, a circuit to which the field windings of said dvnamos are connected,

and two reversing rheostats connected between the main' source and said circuit at different points and by either'of which the fields of said dyn'amo's are '.varied' or reversed to varyorl reverse the energy developed by said dynamos. r

43. In an electric railway system, a plurality of cars coupled together, a series' of three conductors extending through the cars, devices located on each of said cars for propolling said cars, means for supplying energy to said devices, the said deviceson each car comprising a winding" connected across one pair of said conductors, and separate means on each of 'tlle's'aid cars' connected across anotherpair of said conductors whereby from any one point the current passingthrou'gh'said winding may be controlled;

' The combination of apluralit 'of electrically propelled .vehicles couple together, a source 'of electromotive force, propelling electric motors on each'of said vehicles, three conductors extending betweensaid vehicles, the potentials of two of said conductors corresponding to those of the terminals of said sourceof eletromotiyeforce, 'mea'nsnn each ct said vehicles for aflectin g the otential of the thirdconducso tor, an 'electro-res'ponsive device corresponding to eachof said motors and connected between 'said third'vconductor and one of said other two conductora-whereby the said electro-res'ponsive devices reslpond similarly and thereby similarly vary e energy supplied to the said motorsl 45. The combination with asuitable controlling circuit, of a plh'ralit of electromagne windings connected er'ewithand adapte to respond to variation of Volta e, and means for varying and reversing at will the volta e-impressed upon said controlling altering the resistance of said controlling'circui -46. The combination,- withxassg able con-- current supply having ing the voltage developed b trans jmeans for'i'eceivmgfenergy from said trolling circuit, of'a plurality ofelectromagnetic windings connected in parallel be: tween the. opposite mains ofsaid circuit, and adaptedto respectively respond to'variation of voltage, and a controller for varying the voltage impressed upon said controlling 'cir'cuit without thereby altering the resistance of said controlling circuit.

'47; The combination with a suitable controlling circu'igof a plurality of electromagnetic windlngs. connected therewith in parallel and adapted toi respond 'to variations of voltage, and a suitable source of means for varying at will'the' voltageimpressed thereby, the voltage impressed b said source being substantially una'fi'ecte by the internal resistance of said circuit.

48. Thecombin'atio'n with a suit-able controlling circuit, of az'pluralit of electromagnetic windings. connected -t ierewith and adapted to respondto variations of voltage, a dyna'nio electric arately excited fiel winding for supplying current to 'saidcircuit, and

means for varysaid generator. I 49.'The combinatio'nwit a suitable con- :trolling circuit,;"i f a plurality of -electro-' magnetic windings connected in parallel with said'eirduihand adapted to res ondto variations ,inyolta'. Ia generator or 'sup plying cur MEjO SMd circuit, and'means for :varying the -voltage impressed by said gen- Ierator. I w 50.-The combination witha suitable controlling circuin-of a pluralit of elect omagnetic windings connected t erewith and ladapted to respond-to variations of voltage, a dynamoelectric generator'havinga separately excited field winding supplylng cur- (gen'erator having a seplat) font to= said circuit, and a rheostat for vary- {ing the field of said generator. I g 51. The combination with a suitable alter? inatinq current supply circuit, of-an energy ormer receiving alternating current ;from said supply circuit and delivering uniidirectional energy, a controlliirgicircuit supplied withfsuch unidirectional energy, means. Pfor' varying the voltage impressed upon said icontrolling circuit by. said a transformer, and a plurality of electromagnetic windings as gsociated with said contro' ling circuit. i 52. The combination of 'a-su'pply circuit, suphly -'circuit and delivering ener in modi ed -form, controlling means' supp ed with said modified ener means for varying at Wlll ithe voltage 0 the energy supplie Eralityof devicesassociated with said controlling means and responsive to yariations in said modified ener and a translating idevice supplied by sai devices.-

- 53. The combination with a supply circuit,- of amotor generetor-havin the motor iparthere f-energized .bysg d c read, a controls;

a 'pluling circuit connected with the armature of the generator part thereof, means for varying at will the output of said generator part, a plurality of electromagnetic devices associated with said controlling circuit and responsive to different voltages, and a translating device controlled by said devices.

54. In a multiple unit control system, an energy transformer on each of a plurality of units the primary of which is supplied with alternating current energy, a control circuit for the multiple unit system, a variable voltage source for supplying said control circuit, and means controlled by said circuit for changing the voltage of the secondary of each of said transformers.

- 55. The combination with a suitable supply circuit, .of a controlling circuit, a plurality of electromagnetic windings connected to said controlling circuit and ada ted to respond to variations in voltage, an means for varying at will the voltage and also the polarity of the energy generated in said controlling circuit.

56. The combination with a suitable con trolling circuit, of means for varying at will the voltage impressed thereon without-'thcreby altering the resistance of said controlling circuit, a plurality of electromagnetic windings connected in parallel to said controlling circuit, and suitable devices controlled by said electroma netic windings.

57. In a mu tiple unit control s ste a plurality of electric motors to be c r0 led, a controlling circuit, means for varyin at will the voltage and also the polarity o the energy generated in said controlling circuit, and means controlled by said circuit to vary the speed and direction of rotation respectively of said motors.

58. The combination of a plurality of generatin windings having separately excited fielf windings, a. plurality of electric motors acting jointly upon a common load, the armatures of which motors are connected in series with each other and are supplied from said generating windings, and means for varying and reversing the voltage supplied by said generating windings for varying the speed and reversing the direction of rotation of said motors.

59. The combination with a suitable controlling circuit, of a plurality of electromagnetic windings connected therewith, a dynamo electric generator supplying current to said circuit and having a se arately excited field winding, a rheostat or varying the field strength of said generator, an electric motor, and means afi'ected b said windings for controlling the speed 0 said motor.

60. The combination with a supply circuit, of a motor-generator having the motor part thereof energized from said supply circuit, a controlling circuit connected with the armature of the generator part of said motor generator, suitable means for varying at will the voltage developed by said armature, a plurality of electromagnetic windings associated with said controlling circuit and responding in strength to the voltages developed by said armature, anelectric motor, and means affected by said windings for controlling the speed of said motor. 61. The combination of a supply circuit, a motor generator supplied therefrom, a controlling circuit connected with the armature of said motor generator, a master-controller for controlling the voltage of said armature, a plurality of windings connected with said controlling circuit and responding to changes of voltage, and means'comprising a trans lating device controlled by said windings.

62. The combination of a plurality of electrically propelled vehicles forming a train, a supply circuit on more than one of said vehicles, a motor generator on each of said -vehicles having said supply circuit, a controlling circuit on more than one of said vehicles, means whereby any one of said motor generators may be operated from the supply circuit, means whereby all of said controlling circuits may be connected with the generator armature of any one of said motor generators, means for varying the voltage delivered by any of the said generator armatures, and means associated with said controlling circuits responding to variations-of voltage and adapted to control the propelling electric, motors of the train.

63. The combination of a source of electromotive force, a plurality of electric motors,

a controlling circuit, means for controlling both the direction and speed of operation of said motors upon change of voltage and polarity of the current upon said controlling circuit, and means for varying at will the voltage and polarity of the current impressed upon said controlling circuit.

64. In an electric railway system, a plu-' rality of cars coupled togetherto form a train, two supply conductors, a source of constant electromotive force connected between said two conductors, a third conductor which extends through the train, means on the train .connected to said third conductor and to at least one of said two conductors for varying the potential of said third conductor, propelling motors, and electric means connected to said third conductor and to at least one of said two conductors for controlling the energy supplied to the repelling motors.

65. n an'electric railway system, a plurality of cars coupled together to form a train, two supply conductors, a source of constant electrdmotive force connected between said two conductors, a third conductor which extends through the train, means located on a plurality of cars of the train connected to said third conductor and to at least one of tin] of said third conductor, propelling motrain, two

tors, and electric means connected to said third conductor and to at least one of said two conductors for'controlling the speed of the 'n'opelling motors.

(16. In an electric railwaysystem, a plurality of cars coupled together to form'a tween said two conductors, a third conductor which extends through the train, means located on a pll.l rality of cars of the train connected to said third conductor and to atleast one of said two conductors for varying the potential of said third conductor, pro; polling motors, and electric means connectdd to said third conductor and to at least one of said two conductors forward and reverse In lin motors.

6 The combination of a system of,three conductors, tive force connected between two of said conductors, means for varying the potential of the third conductor, and electromagnetic means connected to said third conductor and to at least one of said two conductors and subjected to the variable electromotive orce.

68. The combination of a system of three conductors, a source of constant electromotive force connected between two of said conductors, means connected to at leastone of said two conductors for varying the potential of the third conductor with reference thereto, and electromagnetic means connected to said third conductor and to'at least one of said two conductors and subjected to tion of the propel- -the va 'iable electromotive force.

69. The combination of three conductors, a source of constant electromotive force connected between two of said conductors, means connected to at least one of said two conductors and to said third conductor for varying the potential of the third conductor with reference thereto, an electric motor,

and electromagnetic controlling means for varying the speed of said motor connected to said third conductor and to at least one of said two conductors.

70. The combination of three conductors, a source of-constant electromotive force connected between two of said conductors, means connected to at least one'of said two conductors and to said third conductor for var .ing the potential of the third conductor wit reference thereto, a plurality of electric motors, and electric controlling means for simultaneously varying the speed of said motors, said controlling means being connected to said third conductor and to at least one of said two conductors.

71. The combination of a source of constant electromotive force and supply consupply conductors, a source of constant clectromotive force connected befor controlling the i a source of constant e1ectromodoctors therefrom,

iof said thir conductor with reference to the a motor,

' a motor, a generator supplyin potential of the other conductors a'nd said evices being locatbd at different points, an electric motor, andfelectromagnetic controlling means for varying the speed of said motor connected to said source.

72. The combination of a source of alternating current energy, moving contacts for leading energy from said source upon an electrically propelled vehicle, electromagnetic means on ,said vehicle supplied with alternating current energy from said source, means for varyin at the will of the operator the electromotlve force delivered b said first named means, a plurality of e cctric controlling means subjected to said variable electromotive force, and a plurality of motors controlled by said latter means.

73. The combination of a source of alternating current energy, moving contacts for leading energy from said source upon a train comprlsing a plurality of electrically propelled vehlcles, means for transforming said alternating current energy into energy the eleotromotive force of which is variable at the will of the operator, a control circuit extendin through the train subjected to said variabfii electromotive force, a plurality of means on different cars of the train affected by said control circuit, and electric motors controlled by said latter means.

74. A system of motor control, comprising a generator supplying the armature of said motor, an exciter for the generator field, and means for varying and reversing the field strength of said exciter.

7 5. A motor controlsystem, comprising an electric motor, a generator supplying the armature of said-motor, separate sources of electromotive force for supplying the field windings of said generator and said motor respectlvely, and means for varying and reversing the electromotive force of the source which supplies the generator field.

76. A system of motor control, comprising the armature thereof, a separate source 0 electromotive force supplying the field of the generator, and means for varying and reversing the electromotive force of said separate source.

77. A motor control system, comprising an electric motor, a generator suppl mg the armature thereof, an exciter for tie generator field, and means for reversing the electromotive force of said exciter.

78. Almotor control system comprising a motor, a generator supplying the armature of said motor, two independent sources of electromotive 7 force supplyin the field windings of said generator an said motor to said third conductor and.

reversing the 79. A- motor control system comprising a motor, a generator 'supplyi the armature If said motor, two in epen ent sources of e ectromotive force supplyin the field windin of said generator an said motor respectivel and means for varying-the electromotive orces of said two sources and for electromotive force of one of said sources.

80. A motor control system comprising a motor, a generator supplying the armature of said motor, two sources of electromotive force supplying the field windings of said generator and said motor respectively, and means for varying the electromotive forces of said two sources and for reversing the electromotive force of the source from which the generator field is energized.

81. A motor control system comprising a motor, a generator supplying the armature of said motor, two exciters excited independently of said generator and supplying the field windings of said generator an said motor respectively, and means for varying the field strengths of said exciters. a 82. A motor control system comprislnga motor, a generator supplying the armature of said motor, two exciters excited independently of said generator and supplying the field windings of said generator and said motor respectively, and means for varying the field strengths of said exciters and for reversing the field of one of them.

83. A motor control system comprising a motor, a generator supplying the armature of said motor, two exciters supplying the field windings of said generator and said motor respectively, and means for varying the field strengths of said exciters and for reversing the field oi the exciter :trom which the generator field is energized.

84. A motor control system comprising a plurality of motors connected to a common load, a common source of electromotive force supplying the armatures of said motors, "a common source of electromotive force supplying the field windings of said motors, and means for var ing the field stren of said motors bot individually and collectively.

85. A motor control system comprising an electric motor, separate sources of electromotive force for supplying its armature and its field windings respectiyely, and means for varying the electromotive forces of both of said sources and for reversing the electromotiue force of said armature supplying source.

86. A motor control system comprising a motor, a generator supplying the armature of said motor, two exciters supplying the field windings of said generator and "said motor respectively, and means for varying speed and reversing supplied by any the field stren hs of said exciters and for reversing the old of one of them.

87. The combination of a plurality of generating windings having separately excited field windings, a plurality of electric motors acting jointly upon a common load, the armatures of which motors are connected in series with each other and are supplied from' said generating windings, means for varyin and reversing the voltage supplied by said generating windings for varying the the direction of rotatlon of said motors, and means for separately exciting a field winding said motors.

88. An alternating current supply "circuit, rotary energy converting means supplied therefrom and producing a unidirectional current, a dynamo armature mechanically connected with said rotary means. a separately excited field winding for said dynamo armature, and means for reversing the current in said field winding.

89. A multiple unit control system comprising a source of electromotive force upon. each unit, means for varying the electromotiveforce of any one of said sources, a control circuit adapted to be supplied with energy from any one of said sources, and electroresponsive means upon each of said units "connected with said control circuit.

90. A multiple unit control system comprising a source of energy located upon each of the units, a control circuit adapted to be one of said sources, means for changing at will the voltage impressed by any one of said sources upon said control circuit, and means responsive to such change of voltage for controlling the multiple unit system.

91. A motor control system comprising in addition to the motor controlled, an-electromagnetic device, a control circuit, a se arate source of electromotive force for sai control circuit, and means for reversing the eiect-romotive force impressed upon said circuit by said source and thereby reversing the direction of rotation of the motor.

92. A plurality of vehicles in a train, a propelling motor upon each vehicle, a source of electromotive force upon each vehicle for supplying the armature of its propelling motor, means for leading control ener y along the train, -and a separate variab e source of energy on the train for supplying energy to said means.

93. A motor control system comprising a source of alternating current energy, an alternating current circuit leading therefrom, an electric motor, energy transformin means ada ted to receive energy from sai circuit an deliver energy to a winding of the motor. a control circuit, a separate source of electromot-ive force supplying said cqptrol circuit, and means for c anging the of each of to said control circuit, and means controlled for controlling the t by said control circuit motors.

95. A11 alternating current sup ly circuit, an electric motor, an energy transi drmer supplying energy to a winding of said motor, and motor controlling means comprising an additional energy transformer.

96. An alternating current supply circuit, an electric motor, an energy transformer supplying energy to a winding of said motor, an additional energy transforming device, and controlling means functionally related to said additional device for controlling the energy supplied to said motor wind- 1n 97. The combination of a generator having a separately excited field winding, means for varying the current in said field winding, a plurality of motors having their armatures connected with the armature of said generator, means for exciting a field winding of each of the motors independently of the tension of the armature circuit,

and means for varying the field excitation of each of the motors independently of the field excitation of the other motors.

98. A plurality of sources of electrometive force each having a generating winding for supplying electric energy to a local circuit of each winding respectively, a plurality of sets of electric motors, each set being supplied with energy from its respective generating winding and'having a winding of each motor of each set connected in its respective local circuit, means for connecting said motor windings of each set in series and in parallel, and means for simultaneously varying the electromotive force of'said generating windings.

99. A stationary source of electromotive force, a self-propelled vehicle supplied with energy from said source, means on the vehicle for transforming energy, a propelling motor supplied with ener derived from said means, and additiona means on the vehicle for transforming energy for controlling the propulsion of the vehicle.

100. In a train control system, means for developing upon the train by magnetic induction a plurality of different voltages, a plurality of self-propelling units in the train, two propelling motors on each of such units, a control circuit extending to'each of said units, and means controlled by said circuit for controlling the supply of different voltages from said first'named means to the group of two motors of each unit and for coupling the motor armatures of each unit in series and in )arallel with each other.

101. A plura ity of self-propelling vehicles coupled to form a train, a stationary source of electric energy therefor, a moving contact device on each of said vehicles, an energy transformer on each of said vehicles, two tractive motors on each of said vehicles and controlling means on each of said vehicles for controlling the movement of the several vehicles as a train and for connecting the motors of each vehicle in series and in parallel with each other.

102. The combination of a motor generator, a plurality of motors having armatures connected-to the generator armature of said motor generator, a separate source for supplying a field winding of each of said motors, and controlling; paratusfor varying the field strength 0 the generator of said motor generator and for varying the excitation of the motor fields.

103. In a multiple unit train control system, the combinationwith a plurality of locomotive units of driving motors for said units, energy conveying means extending between the units, and means for controlling the direction o rotation and the speed of said motors by reversing and varying the energy pro need and supplied to said conveying means.

104. The combination with a plurality of self-propelling units 'of a driving motor for each of said units, electromagnetic means upon each of the units for controlling the motors, a separate source of current upon each of said units for supplying current for the operation of said electromagnetic means, and manually controlled means com rising a circuit extending between the .units for simultaneously controlling the operation of said electromagnetic means. 105. The combination of a generator having a separately excited field winding, a plurality of electric motors working on a common load and whose armatures'are supplied with energy from said generator, the armatures of said motors being connected in series with each other and with said generator, and each of said motors having a field winding which is separately excited;

106. The combination of a. generator having a separately excited field winding, a plurality of electric motors working on a common load and whose armat-ures are supplied with ener from said generator, the armatures of said motors being connected in series with each \other and with said generator, each of said motors havin a field winding which is se arately excite and means for reveising to direction of rotation of the motors.

107. The combination of a generator havin; a separately excited field winding, a plura. day of "electric motors working on a common load and whose armatures are supplied with ener y from said generator, the arms.- tures of said motors being connected-in series with each other and with said enerator, each of said motors havin a fiel 'winding which is separately exci simultaneously varying the ,field' strength of said motors.

108. vTh e combination of a generator havin a separately-excited field winding, a plural ity of'electrxcmotors working on a common load and ,whose armatures are supplied with ener from said generator, the armstures of saidinptors being connected in series wjth veach iother and w th said enerator, each of saidmotors havin ii'fiel winding whichis/separstely excit and'means for simultaneously varying the field strength ofsaidmotors and for reversing the direction'o'f rotation of said motors.

, 109,- The combination of a. generatofl'said' generator havi a separately excited field windings plur Copies of this patent may be obtained tornve cents each, by addressingthe comliilssioner and means 'for the field strength of t-y of electric motors work-'1 mg on a common load, and Ineans'forva j. ing the field strength'oi said generator and for connecting the said motors in series or in parallel.

410. -The combination of a generator, said generator havi a separately excited fieldwinding,'e plnra ity of electric'motors worl's. ing on a. common load, and ineans for varying the field strength of said generator, for connecting the said motors in series or in parallel :witheach other and for simultaneously' varying the field strengthof said motors.

1 11. The combination of an ator, urality of electric motors .whose armatnrggare; connected inseries with the armature. of said generator, end means for exciting the-field of said generator independently of the electromotive force of said generator and, for snnultaneously var-yin said motors indepen electric generspecification signed and witnessed thisi'lth day of March 1902.

H WARDKLEOHABD.

Witnesses: f V

H 331 F. DAVD BQF'.

Washington, D. 0."

of Patents, 

